There is not only a close analogy between the operations of the mind in general reasoning and its operations in the particular science of Algebra, but there is to a considerable extent an exact agreement in the laws by which the two classes of operations are conducted.

— George Boole, An Investigation of the Laws of Thought (1854)

Cited via Leandro N. De Castro and Fernando J. Von Zuben's 2005 book.

Topics: mathematics